Oil-burning mechanism



March 1, 1927.

F. HAQINGE ,L

OIL BURNING MECHANIS M '".Fild Dc'. 19. 1923 2 Sheets-Sheet 1 '1 1 1619470 March 927 F. HARDINGE `OIL BURNING MECHANISM Filed Dec. 19, v1925 2 sheetsheet 2 5??, ,6'

l i E jg Patented Mar. 1, 1927.

:UNITED STATES 1,619,470 PAT EN DF'F ICE- `FRANKLIN HARDINGII, or CHICAGO, ILLINOIS, AssIeNoRTo HARDINGE BROTHERS, INCORPORATED, or CHICAGO, ILLINoIs, A oonroRA'rIoN OF ILLINOIS.

OIL-BURNING MECHNISM.

`I'Lpplcatonfiled December 19, 1923. Serial No. 681,461.

My invention relates to improvements in oil burning mechanisms and is particularly concerned with the provision of -novel means for controlling the supply of 'oil to an oil burner used for heating steam boiler or other receptacle in which pressures resulting from the heat are generated.

The objects of my invention are: v

First: To provide a boiler and an oil burner for heating theI same with an improved valve mechanism comprising means vactuated by the pressure developed in the boiler for so controlling the heat supplied to the boiler that the pressure in said boiler will remain substantially constant;

determined by `the manually adjustable means;

Third: To provide a valve of the character described which is particularly adapted to handle fuel oils and other similar heavy oils which rcontain more or less dirt and other impurities having a strong tendenc to clog the valve; and v Fourth: To provide a valve of the character described which is 'simple .in construction, economical to manufacture and reliable in operation.

Other' objects of my invention will appear as this description progresses, reference being had to the'accompanying drawings, kin which- F-igure 1 is an end elevation of a boiler and oil burner for heating the same in combination with my improved valve for controlling the supply of oil to the burner, the

improved valve being shown in side eleva.

tion. A portion of this drawing showing the pressure control element is in section;-

Figure 2 is a plan of my improved valve; and

Figure 3 is a central vertical section.

Throughout the several views similar reference characters will be used for referring to similar parts.

Referring to the drawings, my improved oil burner apparatus comprises a boiler 5, which may be of conventional construction,

having a fire box 6 formed therein into which projects the rota-ry Jatomizingnozzle 7 o'f'an oil burner which 'may be jo-f that Atype `disclosed in my co-pending application Se'- rial No. 572,455, filed July 3, 1922. This atomizing nozzle is rotated through -a suitable gear 'connection lby means of the shaft 8, which is driven by an electric motor (not shown). Oil is supplied to the atomizing nozz-le f7 by means of the rotary pump 59, which is preferably of the gear type and which is Idriven from the vshaft 8 -through the worm l0, worm wheel 11, shaft l2, clutch 13 and shaft 14.

The oil is sucked from a suitable supply tank through the pipe l5, the filter L16 and pipe 17. It is discharged from the pump through the pipe 18 and into the stratify- `ing pipe 19, from which the major portion Aof the oil is discharged baolrto the supply 'tanlr through the pressure regulating valve 2O and the return pipe 21. A portion ofthe oil forced into the pipe `19 passesfout through the pipes 22 and .23 rand through the valve V, the detailsof construction of which will be later referred to. From the valve V the oil passes through the pipe 24 to the atomizing nozzle.

rlChe construction thus farv described is shown indetail and 'claimed in my co-pending application above referred to.l

The valve which I employ for controlling the supply of fuel to the oil burner 'comprises in general the hollow body Vmember 25 having the inlet opening 26 and the outlet port 27, in which is held the tubular valve seat 28 having the beveled upper 'edge 29. This valve seat is retained in place by means of the threaded sleeve 130. The bearing plug 3l passes through the wall of the body member 25 Opposite the port 27 andk supports the rotary valve stem 82, the lower end of which projects into the tubular vvalve seat 28. The lower or inner end of the valve stem 82 is provided with a longitudinally extending bore 33 and in one wall with a substantially triangle-shaped opening 84 for establishing communication Vbetween the body member and the port 33. A worm gear 35 is splined to an upper or outer end of the valve 32 and is supported by the gland 86 and libre washer 37.

The upper or outer end ofthe valve stem 32 is provided with an annular groove 38, which receives a split washer 39. A spring A "il 40, interposed between the split washer 39 and the top of the gear 35, biases the valve towards its open position.

A projection 41,y extending from one side of the body member 25, supports the bracket 42 which is secured to the projection by means of the set screw 43. The upper end of the bracket 42 carries the two lateral extensions 44 between which are clamped the internally threaded sleeve 45 which is longitudinally slotted, as shown at 46. A link 47 connects the projection 48 extending from one side of the body member 25 and the two laterally extending arms 44 by means of the screw 49, which is preferably o f the differential type and which can be used for adjusting the pressure exerted upon the sleeve 45. The sleeve 45 may be held against rotation by means of a` key 50 which is pivoted upon the pin 51 extending between the two arms 44. The free end of this key projects into a longitudinally extending slot formed in t-he sleeve 45. V

A hollow spindle 52, the lower end of which is screwthreaded as shown at 53 for co-acting with the internal threads of the sleeve 45, passes through `the bore in the sleeve 45 and is provided at its upper end with a hub 54, which is secured to the spindle by means of the set screw 55. An operating handle 56 extends outwardly from the hub 54 and may be held in any of its adjusted positions by means of pins 57, which may be inserted in the openings 58 of the quadrant 59. The ends of this quadrant are secured to the bracket 60, which is formed integral with the sleeve 45, by means of the screws 61 (see F ig. 2). From the above description it will be seen that by adjusting the `screw 49 the pressure of the slot-ted sleeve 45 upon the spindle 53 can be varied as desired, so as to provide the proper amount of friction for holding the spindle 52 in any of its adjusted positions.

A rod 62 is slidably mounted in the borev of the spindle 52 and its inner end is provided with an enlargement 63 which is received by the counterbore 64 in the lower end of the spindle 52. This enlargement Vcarries a short rod 65, the exposed end of which is rounded and hardened to form a bearing for the upper end of the valve stem 32. y

The gear 35 is rotated by meansof a worm 66 formed on one end of the shaft 67. This shaft is carried by the bracket 68 adjustably mounted upon the lateral extension 69 of the bracket `42. This shaft is rotated by means of a grooved pulley 70, the belt 71 and the grooved pulley 72 carried by the'shaft 12. The upper end of the bracket is vertically slotted to provide the two bifurcations 73 and 74 between which extend the pivot pin 75 and the stop pin 76. The lever 77 is provided at one end with a plurality of openings 78 for receiving the pivot` pin 75 so asto hold this end 'of the lever 77 in position to Contact with the upper end of the rod 62 when the left-hand end (Figs. 2 and 3) of the lever 77 is raised. To limit the upward movement of the lever 77 I provide a collar 80 which rides upon the lever 77 and between the upper ends of which the stop bar 81 having/the beveled edge 82 is mounted. The collar 80 'is held in any of its ad` justed positionsl by means of the set screw 83. The left-hand or outer end of the lever 77 is provided with a plurality of openings 84 any one of which may be connected by means of thelink or cable 85 (see Fig. l) with anyone of the spaced openings 8G formed in the outer end of the lever 87. The inner end of this lever is provided with a plurality of openingsv88 adapted to receive the pivot pin 89 carried by the outer end of the lateral extension 90 of the cap 91. The upper end of this cap carries a stop pin 92 adapted to co-act with the stop bar 93 carried by the collar 94, which may be held in any of its adjusted positionsupon the lever 87 by means of the set screw 95. This collar and stop bar are similar in construction and operation to t-he collar 8O and stop bar 81.

For utilizing the pressure of the steam in the boiler 5V for controlling the movement of the lever 87 and through it the portage'of the fuel control valve I provide a suitable casing or housing 96 in which is a diaphragm 97 subjected to the pressure ot" the steam in the boiler 5 through the pipe 98 and the union 99. A follower 100 rides upon the diaphragm 97 and is yieldingly held .in contact therewith by means of the compresn sion spring 101 confined between the follower 100 and the large end 102 of the sleeve 103, which is threaded into the cap 104 of the housing 96. The follower 100 carriesa rod 107 which extends outwardly throughV the sleeve 103 and the gland 108 and contacts with the inner enlarged end of the tappet `109. The outer endof this tappetnormally engages the lower edge of the lever 87. v.

Certain details of the valve construct-ion just described are more clearly set forth in my copending application Serial No. 544,- 002, filed `March 15, 1922, to which reference may be made. Y

The adjustment of the control apparatus Vdescribed above, required to assure the maintenance of the desired steam pressure in a boiler, is accomplished by trial, the handle 56 being adjust-ed tojpermit the proper sup-V ply of oil to the atomizing nozzle required for maintaining the desired pressure during the period of the maximum rate of consumption of steam. The length of cable 85 can then be adjusted to cause the apparatus to reduce the rate of supply of fuel to the.

burner, so that the pressure Will be maintained between the desired maximum and minimum limits. By altering the position of the fulcrum pins 7 5 and 89 in their supporting brackets and in the corresponding levers 77 and 87, the valve can be caused to respond more or less quickly to changes in pressure in the boiler, because the neaner the t'ulcrum 89 is moved to the tappet 109 and the farther the pin 7 5 is moved away from the rod 62 the greater will be the movementJ of the valve for any change in position of the tappet 109 due to a changing steam pressure.

Then it is considered that a movement of one or two thousandths of an inch in the position of a valve will entirely change the size of the flame formed by the atomizing nozzle, it will be seen that I have provided means for closely and accurately controlling the pressure in the boiler.

While I have described the details of construction of the preferred embodiment of my invention, it is to be clearly understood that my invention is not limited to these details, but is capable of other adaptations and modiications Within the scope of the appended claims.

Having thus described my invention, what I claim is:

1. The combination with a movable control element comprising a reciprocable rod, a pivoted lever resting upon the outer end of said rod, a stationary stop and an adjustable stop mounted upon said lever for engaging said stationary stop to limit the movement of said lever, of an oil burner and means for controlling the supply of oil to said burner comprising a valve seat, a rotary valve co-acting with said seat, said valve having a valve stem, a spring biasing said valve toward its open position, a sleeve adjacent the outer end of said valve stem, a hollow spindle threaded into said sleeve, means whereby said spindle can be manually adjusted, a rod slidably mounted in said spindle, the inner end of said rod having a shoulder engageable by said spindle and also having engagement with the upper end of said valve stem, a second lever pivotally mounted adjacent the outer end of said rod and resting upon said rod. adjustable means for limiting the movement of said second lever, and means for communicating the movement of said first-named lever to said second lever.

2. The combination with a movable control element, ot an oil burner and means for controlling the supply of oil to said burner comprising a valve seat, a rotary valve coacting with said seat, said valve having a valve stem, a spring biasing said valve toward its open position, a sleeve adjacent the outer end of said valve stem, a hollow spindle threaded into said sleeve, means whereby said spindle can be manually adjusted, a rod slidably mounted in said spindle, the inner end of said rod having a shoulder engageable by said spindle and also having engagement with the upper end of said valve stem, a lever pivotally mounted adjacent the outer end of said rod and resting upon said rod, adjustable means for limiting the movement of said lever, and means for communicating the movement of said element to said lever.

3. The combination with a movable control element, of an oil burner and means for controlling the supply of oil to said burner comprising a valve seat, a rotary valve co-acting with said seat, said valve having a valve stein, a spring biasing said valve toward its open position, a hollow spindle slidably mounted in co-aXially alignment with said valve stem means for longitudinally adjusting said spindle, a rod slidably mounted in said spindle, the inner end of said rod having a shoulder engageable by said spindle and also having engagement with the upper end of said valve stem, a lever pivotally mounted adjacent the outer end of said rod and resting upon said rod, adjustable means ior limit-ing the movement of said lever, and means for communicating the movement of said element to said lever.

In witness whereof, I hereunto subscribe my name this 12th day of December, 1923.

FRANKLIN HARDINGE. 

